Arid
DOI10.1071/BT17150
Demographic vulnerability of an extreme xerophyte in arid Australia
Prior, Lynda D.1; Hua, Quan2; Bowman, David M. J. S.1
通讯作者Prior, Lynda D.
来源期刊AUSTRALIAN JOURNAL OF BOTANY
ISSN0067-1924
EISSN1444-9862
出版年2018
卷号66期号:1页码:26-38
英文摘要

Callitris glaucophylla (syn. C. columellaris F. Muell.) is an iconic Australian conifer that is suffering a recruitment deficit over much of the arid zone. Here, seedling establishment requires a series of unusually wet years, and protection from high levels of herbivory. The aim of our study was to determine the size class structure of C. glaucophylla populations in the most arid part (150 mm mean annual precipitation) of its range, and particularly whether seedlings had established during a wet period in 2010/11. We sampled C. glaucophylla populations throughout the region, including inside a 6000 ha feral animal exclosure. We found no seedlings from 2010/11, except on drainage lines adjacent to roads. Of 255 plots centred on mature trees, only 2% contained older seedlings, and 8% contained saplings, with no differences inside or outside exclosure, and 84% of trees were larger than 20 cm basal diameter. Matching dates of known regeneration with long-term rainfall records suggested that successful regeneration of C. glaucophylla requires a total of 600-720 mm of rain over a 2 year period. Our radiocarbon dating showed the age of three large trees ranged from 106 to 268 years, signifying that such trees in this region likely have only 2-8 climatic opportunities to reproduce.


英文关键词arid plant ecology Callitris spp. conifers herbivory population biology regeneration
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000426048700003
WOS关键词CALLITRIS-GLAUCOPHYLLA CUPRESSACEAE ; TREE-RINGS ; HOLOCENE PALEOENVIRONMENTS ; NORTHWESTERN VICTORIA ; MACDONNELL RANGES ; LAKE TYRRELL ; CONIFER ; COLUMELLARIS ; RADIOCARBON ; GROWTH
WOS类目Plant Sciences
WOS研究方向Plant Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/208012
作者单位1.Univ Tasmania, Sch Biol Sci, Private Bag 55, Hobart, Tas 7001, Australia;
2.Australian Nucl Sci & Technol Org, Locked Bag 2001, Kirrawee Dc, NSW 2232, Australia
推荐引用方式
GB/T 7714
Prior, Lynda D.,Hua, Quan,Bowman, David M. J. S.. Demographic vulnerability of an extreme xerophyte in arid Australia[J],2018,66(1):26-38.
APA Prior, Lynda D.,Hua, Quan,&Bowman, David M. J. S..(2018).Demographic vulnerability of an extreme xerophyte in arid Australia.AUSTRALIAN JOURNAL OF BOTANY,66(1),26-38.
MLA Prior, Lynda D.,et al."Demographic vulnerability of an extreme xerophyte in arid Australia".AUSTRALIAN JOURNAL OF BOTANY 66.1(2018):26-38.
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